RFR: Fix compilation errors on Windows

[Aleksey Shipilev]

On 12/19/2017 10:00 PM, Zhengyu Gu wrote:
> Updated webrev: http://cr.openjdk.java.net/~zgu/shenandoah/win_atomic_fix/webrev.01/index.html

These guys still use jint:

  64   assert (s <= (size_t)max_jint, "sanity");
  65   increase_live_data_words((jint)s);

Otherwise good.

Thanks,
-Alksey